A nice complement to traditional watercolor brushes, the Aquarelle Waterbrush by Caran D'Ache has a built-in water reservoir, making it ideal for travel, art classes, and on-the-spot sketching. The flow of water can be precisely controlled by a large rubber push-button and water valve, which pulls the water from the reservoir. The fiber tip can be cleaned easily by flushing water through the tip via the pump system.